Hi,
I in the progress of determine the differential trace impedance for the Display port data lines.
I face some conflict in the differential trace impedance since TDP 142 suggest to have 100 ohms differential trace impedance while intel platform having the trace impedance requirement less than 88ohms.
The scenario is as shown in the figure below.
I need advice on the option below.
| Option | Section A (differential trace impedance) | Section B (differential trace impedance) |
| 1 | 100 ohms | 85 ohms |
| 2 | 85 ohms | 85 ohms |
| 3 | 100 ohms | 100 ohms |
Thanks.
-Desmond
